An integrated generator, compressor and welding power supply sized to fit within a pickup bed. The reference pulse has a higher probability of containing more than one photon than the signal pulse. The data is then read from the bit-patterned media and used to detect write synchronization errors between the write clock and the location of bit-islands on the bit-patterned media. A next step includes storing the measurement. A customer transacting at a SST during a Self-Service transaction receives in-air tactile communication for assisting the customer during the SS transaction. The bi-planar manifold assembly enhances the compactness of the design of the WTS unit.